Homework Help: Physics

Posted by Forest on Sunday, June 12, 2011 at 6:44pm.

A single photon in empty space is converted into an positron and an electron, each with rest mass 511Mev.

(a) show this transformation is not possible (dynamaically).
(b)How could this transformation be made posible.
(c)what is the minimum photon energy required to enable the process in part b.

please show working

Physics - drwls, Sunday, June 12, 2011 at 7:04pm
I have nothing more to add to my previous answer.
ttp://www.jiskha.com/display.cgi?id=1307558664
Physics - drwls, Sunday, June 12, 2011 at 7:14pm
There should have been an "h" at the beginning of the link I posted.

For a discussion of why a third body is required for pair creation, see
http://books.google.com/books?id=GgFjLiZDOk8C&pg=PA118&lpg=PA118&dq=electron+positron+creation+third+body&source=bl&ots=w0H9QEXfMC&sig=_0Cl-HfHIyIdgCE5xlKSMCqckog&hl=en&ei=oUf1TcTpD-XRiAKzl5mGBw&sa=X&oi=book_result&ct=result&resnum=3&ved=0CCIQ6AEwAg#v=onepage&q=electron%20positron%20creation%20third%20body&f=false

Answer this Question

Related Questions

relativity - Show that the following process is dynamically inpossible: A ...
physics (special relativity) - A single photon in empty space is transformed ...
Physics - A photon of energy E strikes an electron at rest undergoes pair ...
Nuclear Chemistry - The half- life of a positron is very short. it reacts with ...
electron - An electron drops from the fourth energy level, in an atom to the ...
physics - Hydrogen atom is initially in the ground state. It is excited by a ...
physics.... - When a photon bounce off an electron, it gives some of its energy ...
Phsyics - Can someone give me some pointers on calculating the rest energy of a ...
Physics - an electron in a mercury atom jumps from level a to level g by ...
physics - An incident X-ray photon of wavelength 0.2800nm is scattered from an ...

For Further Reading

First Name:
School Subject:
Answer: